Knee: The knee is a joint which has three parts. The thigh bone (the femur) meets the large shin bone (the tibia) to form the main knee joint. This joint has an inner (medial) and an outer (lateral) compartment. The kneecap (the patella) joins the femur to form a third joint, called the patellofemoral joint. The patella protects the front of the knee joint.
Two major areas in the brain affected by autism are Wernicke's Area and Broca's Area (Carlson, 1999). Some other areas studied shown to be affected in autistic patients include the limbic system, cerebellum and association cortex.
It is widely accepted that atypical brain development underlies the development of the observable symptoms of ASD (see First Signs of Autism). How genes and the environment interact to cause the brain to begin developing differently is still being debated.